Numerical integration of the one-dimensional Time-Dependent Schrodinger Equation (TDSE) of the helium atom in the interaction with a strong electromagnetic field [Dataset]

Abstract

[EN] We provide results of the numerical integration of the one-dimensional Time-Dependent Schr dinger Equation (TDSE) of the helium atom in the interaction with a strong electromagnetic field. We compare different theoretical models: (i) Two Active Electrons (TAE), which is the exact 1D description of the He atom, (ii) Idle Electron model (IDL), considering twoelectron correlation, and only one electron interacting with the external field, (iii) Single-Active Electron approximation (SAE), and (iv) the exact 1D description of the helium cation (He+). The methodology and data interpretation are publicly available in [1] A. de las Heras, C. Hern ndez-Garc a, and L. Plaja, "Spectral signature of back reaction in correlated electron dynamics in intense electromagnetic fields", Phys. Rev. Res. 2, 033047 (2020). Concretely this dataset contains: - High-order harmonic spectra for different wavelengths (400 nm-1030 nm) and peak intensities ((1.6 – 10) 10!" W/ cm#) of the driving laser field. - Excited atomic transitions after the laser pulse (515 nm wavelength and 1.6 10!" W/cm# peak intensity) in the TAE and IDL descriptions. - Energy levels of the He atom (TAE) and the cation He+. - Wavefunction of the second excited state of He. One-electron energy dependence on the position of a secondary electron.